Cross language search options

ABSTRACT

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for cross-language image search. One method includes receiving an image search query and image search results responsive to the image search query. Translations of the image search query into other languages are obtained, and search results responsive to each of the translations are received. Instructions are provided to a client device. The instructions cause the client device to present a user interface that includes one or more of the image search results responsive to the image search query and a cross-language search option for each of the translations. Each cross-language search option includes the translation and a preview of the image search results responsive to the translation.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.13/510,561, filed on May 17, 2012, which is a 371 application ofPCT/CN2009/001287, filed on Nov. 20, 2009. The disclosures of the priorapplications are considered part of and are incorporated by reference inthe disclosure of this application.

BACKGROUND

This specification relates to image search.

Internet search engines provide information about Internet accessibleresources (e.g., web pages, images, text documents, multimedia content)that are responsive to a user's search query. For example, when a usersubmits an image search query, i.e., one or more terms that an Internetsearch engine uses to search images, the Internet search engine cangenerate a group of image search results responsive to the image searchquery, and present them to the user. However, for certain queries,translations of the queries in particular languages have better results(e.g., more relevant results, more diverse results, more numerousresults, etc.). For example, if the query is the name of a Japanesepopular culture icon, search queries in Japanese will likely have betterresults than search queries in English. Therefore, a user who enters animage search query in a given language for a particular subject may notbe presented with as good of image search results as the user would beif he or she had entered the same search query for the particularsubject in a different language.

SUMMARY

This specification describes technologies relating to cross-languageimage search.

In general, one aspect of the subject matter described in thisspecification can be embodied in methods that include the actions ofreceiving, at a data processing apparatus, a first image search queryand first image search results that are responsive to the first imagesearch query, the first image search query being one or more terms in afirst language; obtaining, by the data processing apparatus,translations of the first image search query, wherein each translationis a translation of the first image search query into a respectivesecond language different from the first language; receiving, at thedata processing apparatus, for each translation of the first imagesearch query, respective image search results that are determined to beresponsive to the translation of the first image search query when thetranslation is used as an image search query; and providing firstinstructions to a client device that, when executed by the clientdevice, cause the client device to present a user interface including:one or more of the first image search results responsive to the firstimage search query; and a respective cross-language search option foreach of the translations of the first image search query, the respectivecross-language search option for each translation including thetranslation and a preview of the respective image search resultsresponsive to the translation, wherein each cross-language search resultis selectable in the user interface. Other embodiments of this aspectinclude corresponding systems, apparatus, and computer programs productsrecorded on computer storage devices, each configured to perform theoperations of the methods.

These and other embodiments can each optionally include one or more ofthe following features. The preview of the respective image searchresults responsive to a respective translation of the image search querycan be an image associated with one of the respective image searchresults.

The method can further include, in response to a selection of a firstcross-language search result, providing second instructions to theclient device that, when executed by the client device, cause the clientdevice to present a user interface including a first translationcorresponding to first the cross-language search result and therespective image search results that are responsive to the firsttranslation. The second instructions can further include instructionsthat, when executed by the client device, cause the client device topresent the first image search query. The first image search query canbe selectable in the user interface. The method can further include, inresponse to a selection of the first image search query, providing thirdinstructions to the client device that, when executed by the clientdevice, cause the client device to present a user interface includingthe first image search results.

Obtaining one or more selected translations for the first image searchquery can include receiving a plurality of candidate translations of thefirst image search query; determining a score for each candidatetranslation; and selecting the translations from the candidatetranslations according to the scores. Determining a score for acandidate translation can include determining the score for thecandidate translation from a frequency of submission measurement thatmeasures how often the candidate translation is received from users asan image search query. Determining a score for a candidate translationcan include determining the score for the candidate translation from afrequency of revision measurement that measures how often search queriesin the first language are revised by users to corresponding searchqueries in the respective second language of the candidate translation.Determining a score for a candidate translation can include determiningthe score for the candidate translation from a click through rate forthe candidate translation when the candidate translation is submitted asa search query, wherein the click through rate measures how often usersselect search results responsive to the candidate translation.Determining a score for a candidate translation can include determiningthe score for the candidate translation from a unique users measurementthat estimates a number of unique users that submitted the candidatetranslation as a search query. Determining a score for a candidatetranslation comprises determining the score for the candidatetranslation from a quantity of results measurement that measures anumber of image search results responsive to the candidate translation,when the candidate translation is submitted as an image search query.

Particular embodiments of the subject matter described in thisspecification can be implemented so as to realize one or more of thefollowing advantages. A user can be presented with additional searchoptions that allow the user to identify additional relevant image searchresults. The additional search options can be in languages that the useris not necessarily familiar with. A user can view a preview of thesearch results for various search options to estimate how useful eachoption will be. A user can be presented with other indications ofusefulness for each search option, for example, the number of resultsavailable with that search option and the name of the language of thesearch option.

The details of one or more embodiments of the subject matter describedin this specification are set forth in the accompanying drawings and thedescription below. Other features, aspects, and advantages of thesubject matter will become apparent from the description, the drawings,and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of an example environment in which an imagesearch system provides image search services.

FIG. 2A illustrates an example search user interface that presentscross-language search options along with search results responsive to aquery.

FIG. 2B illustrates an example image search interface that presentsimage search results responsive to a translation of the query.

FIG. 3 is a block diagram illustrating an example architecture of animage search system.

FIG. 4 is a block diagram illustrating an example translation engine.

FIG. 5 is a flow diagram of an example image search user interfacegeneration process.

Like reference numbers and designations in the various drawings indicatelike elements.

DETAILED DESCRIPTION §1.0 Example Search Environment

FIG. 1 is a block diagram of an example environment 100 in which animage search system 110 provides image search services. The exampleenvironment 100 includes a network 102, e.g., a local area network(LAN), wide area network (WAN), the Internet, or a combination of them,that connects web sites 104, user devices 106, and the search system110. The environment 110 may include several web sites 104 and userdevices 106.

A web site 104 is one or more resources 105 associated with a domainname and hosted by one or more servers. An example web site is acollection of web pages formatted in hypertext markup language (HTML)that can contain text, images, multimedia content, and programmingelements, e.g., scripts. Each web site 104 is maintained by a publisher,e.g., an entity that manages and/or owns the web site.

A resource is any data that can be provided by the web site 104 over thenetwork 102 and that is associated with a resource address. Resourcesinclude HTML pages, word processing documents, and portable documentformat (PDF) documents, images, video, and feed sources, to name just afew. The resources can include content, e.g., words, phrases, images andsounds. The resources can also include embedded information (e.g., metainformation and hyperlinks) and/or embedded instructions (e.g.,JavaScript scripts).

A user device 106 is an electronic device that is under the control of auser and is capable of requesting and receiving resources over thenetwork 102. Example user devices 106 include personal computers, mobilecommunication devices, and other devices that can send and receive dataover the network 102. A user device 106 typically includes a userapplication, e.g., a web browser, to facilitate the sending andreceiving of data over the network 102.

To facilitate searching of resources, a search system identifies theresources by crawling and indexing the resources provided by the websites 104. Data about the resources can be indexed based on the resourceto which the data corresponds. The indexed, and optionally cached,copies of the resources are stored in an indexed cache 112.

The user devices 106 submit image search queries 114, and optionallyother search queries, to the image search system 110. The image searchsystem 110 can be a separate search system, or part of a larger searchsystem that searches other types of resources. In response to receivingan image search query 114 from a user device 106, the search system 110uses its search engine 116 to access the indexed cache 112 and identifyimage resources that are relevant to the search query. Image resourcescan include images, video, and other visual content. The search engine116 generates image search results that identify the image resources. Animage search result is data generated by the search engine 116 thatidentifies an image resource that is responsive to a particular searchquery, and includes a link to the image resource, or the web site thatcontains the image resource. An example image search result can include,for example, a thumbnail image of the image resource, a snippet of text,the URL of the web page, and a link to the web page or image resource.

The search engine 116 can rank the image search results based on scoresrelated to the resources identified by the search results, as well asexample relevance feedback scores. Scores related to the resourcesinclude, for example, information retrieval (“IR”) scores and optionallya quality score of each resource relative to other resources. In someimplementations, the IR scores are computed from dot products of featurevectors corresponding to a search query 114 and a resource, and theranking of the search results is based on scores that are a combinationof the IR scores and quality scores. For image search results, therelevance feedback score can be used in combination with the IR scoreand the quality score when generating scores to rank the image searchresults. An example relevance feedback score is a score derived from aclick-through rate of an image in a search result.

The instruction engine 118 sends instructions 122 to a user device 106in response to receiving an image search query 114 from the image searchdevice. The instructions 122 cause the user device 106 to display a userinterface that includes the image search results responsive to a query114 from the user device 106, and to present one or more cross-languagesearch options. As used herein, a “cross-language search option” is atranslation of the query 114 into another language and a preview ofsearch results responsive to the translation when the translation isused as an image search query. Cross-language search options aredescribed in more detail below with reference to FIGS. 2A and 2B.

The translations of the query can be exact translations or approximatetranslations. An exact translation of query terms in a first language isthe corresponding term(s) in a second language that are the definitionalequivalent to the terms in the first language. An approximatetranslation of query terms in a first language is the correspondingterm(s) in a second language that are semantically similar to the queryterms in the first language, but are not otherwise the definitionalequivalent to the terms in the first language. As will be describedbelow, semantic similarity of terms in different languages can bederived from similar search results, selections, and other signals. Thetranslated queries are generated by the translation engine 120.

The user devices 106 receive the instructions 122, e.g., in the form ofone or more web pages, and present the user interface to users. Inresponse to the user selecting a link in a search result at a userdevice 106, the user device 106 requests the resource identified by thelink. The web site 104 hosting the resource receives the request for theresource from the user device 106 and provides the resource to therequesting user device 106.

Image search queries 114, and other search queries, submitted duringuser sessions can be stored in a data store such as the historical datastore 124. Selection data specifying user actions taken after searchresults are provided are also stored in a data store such as thehistorical data store 124. These actions can include whether a searchresult was selected. The data stored in the historical data store 124can be used to map search queries submitted during search sessions toresources that were identified in search results and actions taken byusers.

§2.0 Example Image Search Interfaces

FIG. 2A illustrates an example search user interface 200 that presentscross-language search options along with search results responsive to aquery. The text of the user interface 200 is shown in English forconvenience; however, the text of the user interface can alternativelybe in the language of the user submitting the query.

The image search user interface 200 presents three image search results204, 206, and 208, responsive to the user query “

” 202, meaning “alien” in Chinese. In some cases, the user is satisfiedwith the image search results 204, 206, and 208. However, the user mayalso be disappointed with the search results 204, 206, and 208, forexample, because the user wanted more search results, or because theuser wanted different search results. For example, if the user wasreally interested in image search results relevant to the movie “E.T.:The Extra-Terrestrial,” the image search results 204, 206, and 208 willnot be what the user is interested in.

If a user is fluent in other languages, a user might re-try the searchin a different language. However, users are often unfamiliar with theother languages. To help users select appropriate search queries inother languages, the user interface 200 presents several cross-languagesearch options 210. Each cross-language search option 210 corresponds toa translation of the query 202. For example, cross-language searchoption 212 corresponds to the English term “E.T.” Some of thecross-language search options 210 are in the same language as eachother, and others are in different languages. In various otherimplementations, the cross-language search options 210 can all be in thesame language, or can all be in different languages.

Each cross-language search option 210 includes an identification of thetranslation, and a preview of image search results responsive to thetranslation, when the translation is used as an image search query. Thepreview can be, for example, an image from one of the image searchresults responsive to the translation. The preview can alternatively oradditionally be other information describing the image search resultsresponsive to the translation. For example, cross-language search result212 includes the approximate translation 214 “E.T.,” and an image 216from an image search result responsive to the translation. Thecross-language search result 212 also includes an identification of thelanguage of the translation, “English” 218, and the estimated, oractual, number 220 of image search results responsive to thetranslation.

A user can select one of the cross-language search options 210, e.g., byclicking the search option with a mouse or keyboard, or selecting thesearch option with another input device. In response to the selection,the user is presented with a new user interface that includes searchresults responsive to the translation corresponding to the selectedcross-language search option. The cross-language search options 210 thusallow a user to expand his or her searches to other languages. The imagepreview provides the user with a visual representation of the searchresults responsive to the translation. This allows the user tounderstand what types of images will be presented for a translation,even if the user is not familiar with the language of the translation.

While the cross-language search options 210 are shown below the searchresults 204, 206, and 208 responsive to the query 202, thecross-language search options 210 can appear in other locations in theuser interface 200, including, but not limited to, above the searchresults, to the left of the search results, to the right of the searchresults, or intermixed with the search results.

FIG. 2B illustrates an example image search interface 250 presentingimage search results 252 responsive to the search query “alien.” Theuser interface 250 is presented to a user after the user selects thecross-language search option 222 corresponding to the translation“alien” in FIG. 2A.

The user interface 250 includes image search results 252 responsive to aquery for “alien.” These image search results 252 include image searchresult 254. The image of image search result 254 was the preview imagefor the cross-language search option 222 shown in FIG. 2A. The imagesearch results 252 are different from the image search results 204, 206,and 208 shown in FIG. 2A. The search results 252 are different becausethey were identified by a search engine as being responsive to thephrase “alien,” as opposed to “

.” Therefore, the user has been provided with different image searchresults through the cross-language search option 222.

In addition to the image search results 252, the user interface 250 alsoincludes an identification 256 of the translation, “alien,” and anidentification of the user's original query 258, “

.” The user can select the original query 258. If the user does so, theuser will be returned to the user interface 200 shown in FIG. 2A.

The user interface 250 also includes cross-language search options 260.The cross-language search options 260 are cross-language search optionsfor the translation “alien.” However, in other implementations,cross-language search options for the original query “

” can alternatively, or additionally, be shown.

§3.0 Example Architecture of Image Search System

FIG. 3 is a block diagram illustrating an example architecture of theimage search system 110. The image search system 110 receives an imagesearch query 114 from a user device 106 through a network 102, and inresponse to the search query 114 sends instructions 122 to the userdevice 106. The instructions cause the user device 106 to present theuser interface described above with reference to FIG. 2A. The searchsystem 110 can also receive selections 302 from the user device 106. Inresponse to these selections 302 the search system 110 sends additionalinstructions 122 to the user device 106 to cause the user interface topresent additional user interfaces, for example, the user interfacesdescribed above with reference to FIGS. 2A and 2B.

The image search system 110 includes a translation engine 120, a searchengine 116, and an instruction engine 118.

The translation engine 120 receives the image search query 114 andgenerates one or more translations 304 of the image search query 114.Each translation 304 is in a language different from the language of theimage search query 114; however, multiple translations 304 can beprovided in the same language. These translations 304 are provided tothe search engine 116 and the instruction engine 118. The translationengine is described in more detail below, with reference to FIG. 4.

The search engine 116 receives the image search query 114 and thetranslations 304. The search engine 116 identifies image search results306 responsive to the image search query 114, and image search results308 responsive to each of the translations 304, for example, asdescribed above with reference to FIG. 1. In some implementations, thesearch engine 116 ranks search results differently, or searches adifferent index of resources, based on a language associated with theuser who submitted the image search query 114. The language can beassociated with the user, for example, according to one or moreuser-specified preferences, or according to a geographic location of theuser. Alternatively, the search engine 116 can associate the language ofeach translation with the user when identifying image search resultsresponsive to the translation.

The instruction engine 118 receives the translations 304, the searchresults 306 for the image search query, and the search results 308 forthe translations, and generates instructions to send to the user device106. The instruction engine 118 can generate instructions to cause theuser device to present various user interfaces.

For example, the instruction engine 118 can generate instructions, thatwhen executed by the user device 106, cause the user device 106 topresent a user interface including the search results 306 responsive tothe image search query 114, as well as a cross-language search optioncorresponding to each of the translations 304. An example of this userinterface is described above, with reference to FIG. 2A. Thecross-language search option for a translation includes the translationand a preview of the image search results 308 responsive to thetranslation. In some implementations, the preview is an imagecorresponding to one of the image search results 308 for thetranslation. The instruction engine 118 can select the image, forexample, by selecting the image corresponding to the highest-rankedimage search result, by selecting the image corresponding to a randomlyselected image search result in a top number of search results, or byselecting the image whose corresponding image search result is mostfrequently selected by users, e.g., as indicated by historical data suchas the historical data in the historical data store 124 described abovewith reference to FIG. 1.

In response to a user selecting one of the cross-language searchoptions, the instruction engine 118 generates instructions that, whenexecuted by the user device 106, cause the user device 106 to present auser interface including the search results 308 responsive to thetranslation corresponding to the selected cross-language search option.An example of this user interface is described above, with reference toFIG. 2B.

Once the user device presents the user interface including the searchresults 308 responsive to the translation corresponding to the selectedcross-language search option, the user can select the original query inthe user interface. In response to this selection, the instructionengine 118 generates instructions that, when executed by the user device106, cause the user device 106 to once again present a user interfaceincluding the search results 306 responsive to the search query 114, aswell as the cross-language search options corresponding to thetranslations 304.

§3.1 Example Translation Engine

FIG. 4 is a block diagram illustrating an example translation engine120. The translation engine 120 receives an image search query 114 andgenerates one or more translations 304 of the image search query. Theexample translation engine 120 includes a translation generator 402, atranslation scorer 404, and a translation selector 406.

The translation generator 402 processes the image search query 114 togenerate one or more candidate translations 408. As described above, thecandidate translations 408 can include exact translations andapproximate translations. The translation generator can generate theexact translations 408, for example, using conventional techniques, forexample, by retrieving translations for the terms of the query from adictionary that associates terms with their translations, or by usingvarious machine translation techniques. The system can generateapproximate translations in various ways. For example, the approximatetranslations can be retrieved from a database that associates words withtheir approximate translations. The approximate translations can bederived from similar search results, selections, and other signals. Forexample, if two queries have similar responsive search results, or ifusers select similar search results responsive to the two queries, thenthe terms of one query can be associated with the terms of the otherquery as an approximate translation, and vice versa. The search resultscan be similar if there is a statistically significant overlap in thesearch results. Search results selected by users can be determined to besimilar if there is a statistically significant overlap between thegroups of selected search results.

The translation scorer 404 receives the candidate translations 408 andgenerates a score for each of the candidate translations. The score canbe based on one or more factors including, but not limited to,measurements of the candidate translation 408 as a query, measurementsof the search results responsive to the candidate translation 408 as aquery, and language promotion measurements.

Measurements of the candidate translation 408 as a query include, butare not limited to, a click-through-rate for the candidate translation408, a unique users measurement for the candidate translation 408, and afrequency of submission measurement for the candidate translation 408.The click-through-rate for the candidate translation 408 is the numberof times users select one or more search results in response to a querydivided by the total number of times users submit the query.

The unique users measurement estimates the number of unique users whosubmit the candidate translation as a query and/or the number of uniqueuser devices used to submit the query. The translation scorer 404 canestimate the number of unique users who submitted the candidatetranslation using various techniques, for example, by counting thenumber of unique Internet Protocol (IP) addresses from which the querywas submitted, or by counting a number of cookies assigned by a searchengine to users who submitted the query. In some implementations, thedata used to identify the number of unique users is anonymized forprivacy protection. For example, each user can be identified by anInternet protocol (IP) address of a corresponding user device, or can beidentified according to a unique random number that is associated withthe IP address of the user device. The cookie data can be similarlyanonymized. Thus, the user data is not associated with and does notidentify a particular user. Other anonymization processes, such ashashing, encryption and obfuscation techniques, can also be used toensure that user privacy is protected.

The frequency of submission measurement represents how often thecandidate translation 408 is received from a user as a search query, oralternatively as an image search query. The frequency of submissionmeasurement can be determined, for example, by analyzing data in thehistorical data store 124. For example, if the historical data storeincludes what search queries, or image search queries, users havesubmitted, the frequency of submission measurement can be determined bycounting the number of times a query for the candidate translation 408occurs in the data. In some implementations, the frequency of submissionmeasurement is determined by dividing that count by the total number ofqueries users submitted.

In some implementations, the frequency of submission measurement has onevalue when the query is a long-tailed query, and a different value whenthe query is not a long-tailed query. The translation scorer candetermine whether a query is a long-tailed query according to variousmetrics. For example, in some implementations, a query is a long-tailedquery when it is submitted with a frequency that is less than athreshold. In other implementations, a query is a long-tailed query whenthe unique users measurement for the query is below a threshold. Inother implementations, a query is a long-tailed query when the temporalor geographic standard deviation of the number of times the query issubmitted is below a threshold, e.g., when the query was primarilysubmitted during a short period of time or by users in a smallgeographic region.

Measurements of the search results responsive to the candidatetranslation 408 as a query include, but are not limited to, a quantityof results measurement and/or a visual similarity measurement. Thequantity of results measurement is the number of search resultsresponsive to the candidate translation 408, when the candidatetranslation 408 is used as an image search query. The visual similaritymeasurement is an estimate of visual similarity between a group ofsearch results responsive to the image search query 114 and a group ofsearch results responsive to the candidate translation 408 when thecandidate translation is used as an image search query.

Language promotion measurements estimate interrelatedness between thelanguage of the image search query 114 and the language of the candidatetranslation 408. For example, a language promotion measurement can be afrequency of revision measurement. The frequency of revision measurementmeasures how often search queries issued in the language of the imagesearch query 114 are revised to corresponding search queries in thelanguage of the candidate translation 408. A given search query in thelanguage of the image search query 114 is considered to have beenrevised to a corresponding search query in the language of the candidatetranslation 408 when a user submits the given search query and thensubmits the corresponding search query. The corresponding search queryis an exact translation, or an approximate translation, of the givensearch query. For example, if the language of the image search query 114is English and the language of the candidate translation 408 is French,when a user submits a search for “Eiffel Tower” and then submits asearch for “De Toren Van Eiffel,” the translation scorer 404 canconsider “De Toren Van Eiffel” to be a corresponding search query,because it is the French translation of the English phrase “EiffelTower.”

The translation scorer 404 can determine the frequency of revisionmeasurement for the languages of the image search query 114 and acandidate translation 408, for example, from an analysis of the data inthe historical data store 124. The corresponding search query can be anexact translation, e.g., as determined according to conventionaltranslation techniques. The corresponding search query can alternativelybe an approximate translation, e.g., a translation that differs in theuse of slang words or differ in the use of articles such as “a” or“the.” The corresponding search query can be submitted immediatelyfollowing the given search query, or can be submitted within apre-determined window such as a pre-determined number of queries or apre-determined amount of time. The window can be determined, forexample, empirically.

In general, a high frequency of revision measurement indicates overlapin searches between the language of the image search query 114 and thecandidate translation 408, and therefore is an indication that thecandidate translation 408 should be presented to a user.

Once the translation scorer 404 identifies the factors, the translationscorer 404 uses the factors to generate a score, for example, by takinga weighted sum, or weighted average, of the factors. The weights for aweighted sum or average can be determined, for example, empirically. Insome implementations the translation scorer 404 normalizes the factorsbefore they are combined.

The translation selector 406 receives the candidate translations 408 andtheir scores 410 from the translation scorer 404, and selects one ormore of the candidate translations 408. The selected translations arethen output as the translations 304 of the image search query 114. Thetranslation selector 406 selects the translations 304 from the candidatetranslations 408 according to the scores for the candidate translations408. For example, the translation selector 406 can select a top numberof candidate translations 408 ranked in order of score, or can selectall candidate translations 408 having a score that satisfies athreshold. The number and the threshold can be determined, for example,empirically.

While the above description focuses on a translation engine wherecandidate translations 408 are generated, and then translations 304 areselected from the candidate translations 408, in other implementations,the translation engine 120 can also use different selection methods, oralternatively can select all translations that are generated.

§4.0 Example Image Search User Interface Generation Process

FIG. 5 is a flow diagram of an example image search user interfacegeneration process 500. The process 500 is used to generate instructionsthat cause a client device to present a user interface including imagesearch results responsive to a query, and cross-language search optionscorresponding to the query. The process 500 can be implemented, forexample, by the image search system 110.

The process 500 receives an image search query and image search resultsresponsive to the image search query (502). The image search query canbe received from a user device, for example, as described above withreference to FIG. 3. The image search results can be received, forexample, from a search engine, as described above with reference to FIG.3. The process 500 then obtains one or more translations of the imagesearch query (504), for example, as described above with reference toFIGS. 3 and 4. The process 500 then receives image search resultsresponsive to each of the translations of the image search query, wheneach translation is used as an image search query (506), for example, asdescribed above with reference to FIG. 3. The system then providesinstructions to a client device (508). When the instructions areexecuted by the client device, they cause the client device to present auser interface including image search results responsive to the imagesearch query, and a respective cross-language search option for each ofthe translations. Each cross-language search option is selectable in theuser interface. This step is described in more detail above withreference to FIG. 3.

In some implementations, the process 500 further provides additionalinstructions to the client device in response to a selection of one ofthe cross-language search options. These instructions cause the clientdevice to present a second user interface including the translation ofselected cross-language search option, and image search resultsresponsive to the translation. An example of this user interface isdescribed above, with reference to FIG. 2B. The process 500 can furtherprovide still additional instructions to the client device in responseto selection of the original image search query in the second userinterface. These instructions cause the client device to present a userinterface including the image search results responsive to the originalimage search query.

Embodiments of the subject matter and the functional operationsdescribed in this specification can be implemented in digital electroniccircuitry, or in computer software, firmware, or hardware, including thestructures disclosed in this specification and their structuralequivalents, or in combinations of one or more of them. Embodiments ofthe subject matter described in this specification can be implemented asone or more computer programs, i.e., one or more modules of computerprogram instructions encoded on a computer storage medium for executionby, or to control the operation of, data processing apparatus.Alternatively or in addition, the program instructions can be encoded ona propagated signal that is an artificially generated signal, e.g., amachine-generated electrical, optical, or electromagnetic signal, thatis generated to encode information for transmission to suitable receiverapparatus for execution by a data processing apparatus. The computerstorage medium can be a machine-readable storage device, amachine-readable storage substrate, a random or serial access memorydevice, or a combination of one or more of them.

The term “data processing apparatus” encompasses all kinds of apparatus,devices, and machines for processing data, including by way of example aprogrammable processor, a computer, or multiple processors or computers.The apparatus can include special purpose logic circuitry, e.g., an FPGA(field programmable gate array) or an ASIC (application-specificintegrated circuit). The apparatus can also include, in addition tohardware, code that creates an execution environment for the computerprogram in question, e.g., code that constitutes processor firmware, aprotocol stack, a database management system, an operating system, or acombination of one or more of them.

A computer program (also known as a program, software, softwareapplication, script, or code) can be written in any form of programminglanguage, including compiled or interpreted languages, or declarative orprocedural languages, and it can be deployed in any form, including as astand-alone program or as a module, component, subroutine, or other unitsuitable for use in a computing environment. A computer program may, butneed not, correspond to a file in a file system. A program can be storedin a portion of a file that holds other programs or data (e.g., one ormore scripts stored in a markup language document), in a single filededicated to the program in question, or in multiple coordinated files(e.g., files that store one or more modules, sub-programs, or portionsof code). A computer program can be deployed to be executed on onecomputer or on multiple computers that are located at one site ordistributed across multiple sites and interconnected by a communicationnetwork.

The processes and logic flows described in this specification can beperformed by one or more programmable processors executing one or morecomputer programs to perform functions by operating on input data andgenerating output. The processes and logic flows can also be performedby, and apparatus can also be implemented as, special purpose logiccircuitry, e.g., an FPGA (field programmable gate array) or an ASIC(application-specific integrated circuit).

Processors suitable for the execution of a computer program include, byway of example, both general and special purpose microprocessors, andany one or more processors of any kind of digital computer. Generally, aprocessor will receive instructions and data from a read-only memory ora random access memory or both. The essential elements of a computer area processor for performing or executing instructions and one or morememory devices for storing instructions and data. Generally, a computerwill also include, or be operatively coupled to receive data from ortransfer data to, or both, one or more mass storage devices for storingdata, e.g., magnetic, magneto-optical disks, or optical disks. However,a computer need not have such devices. Moreover, a computer can beembedded in another device, e.g., a mobile telephone, a personal digitalassistant (PDA), a mobile audio or video player, a game console, aGlobal Positioning System (GPS) receiver, or a portable storage device(e.g., a universal serial bus (USB) flash drive), to name just a few.

Computer-readable media suitable for storing computer programinstructions and data include all forms of non-volatile memory, mediaand memory devices, including by way of example semiconductor memorydevices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks,e.g., internal hard disks or removable disks; magneto-optical disks; andCD-ROM and DVD-ROM disks. The processor and the memory can besupplemented by, or incorporated in, special purpose logic circuitry.

To provide for interaction with a user, embodiments of the subjectmatter described in this specification can be implemented on a computerhaving a display device, e.g., a CRT (cathode ray tube) or LCD (liquidcrystal display) monitor, for displaying information to the user and akeyboard and a pointing device, e.g., a mouse or a trackball, by whichthe user can provide input to the computer. Other kinds of devices canbe used to provide for interaction with a user as well; for example,feedback provided to the user can be any form of sensory feedback, e.g.,visual feedback, auditory feedback, or tactile feedback; and input fromthe user can be received in any form, including acoustic, speech, ortactile input. In addition, a computer can interact with a user bysending documents to and receiving documents from a device that is usedby the user; for example, by sending web pages to a web browser on auser's client device in response to requests received from the webbrowser.

Embodiments of the subject matter described in this specification can beimplemented in a computing system that includes a back-end component,e.g., as a data server, or that includes a middleware component, e.g.,an application server, or that includes a front-end component, e.g., aclient computer having a graphical user interface or a web browserthrough which a user can interact with an implementation of the subjectmatter described in this specification, or any combination of one ormore such back-end, middleware, or front-end components. The componentsof the system can be interconnected by any form or medium of digitaldata communication, e.g., a communication network. Examples ofcommunication networks include a local area network (“LAN”) and a widearea network (“WAN”), e.g., the Internet.

The computing system can include clients and servers. A client andserver are generally remote from each other and typically interactthrough a communication network. The relationship of client and serverarises by virtue of computer programs running on the respectivecomputers and having a client-server relationship to each other.

While this specification contains many specific implementation details,these should not be construed as limitations on the scope of anyinvention or of what may be claimed, but rather as descriptions offeatures that may be specific to particular embodiments of particularinventions. Certain features that are described in this specification inthe context of separate embodiments can also be implemented incombination in a single embodiment. Conversely, various features thatare described in the context of a single embodiment can also beimplemented in multiple embodiments separately or in any suitablesubcombination. Moreover, although features may be described above asacting in certain combinations and even initially claimed as such, oneor more features from a claimed combination can in some cases be excisedfrom the combination, and the claimed combination may be directed to asubcombination or variation of a subcombination.

Similarly, while operations are depicted in the drawings in a particularorder, this should not be understood as requiring that such operationsbe performed in the particular order shown or in sequential order, orthat all illustrated operations be performed, to achieve desirableresults. In certain circumstances, multitasking and parallel processingmay be advantageous. Moreover, the separation of various systemcomponents in the embodiments described above should not be understoodas requiring such separation in all embodiments, and it should beunderstood that the described program components and systems cangenerally be integrated together in a single software product orpackaged into multiple software products.

Particular embodiments of the subject matter have been described. Otherembodiments are within the scope of the following claims. For example,the actions recited in the claims can be performed in a different orderand still achieve desirable results. As one example, the processesdepicted in the accompanying figures do not necessarily require theparticular order shown, or sequential order, to achieve desirableresults. In certain implementations, multitasking and parallelprocessing may be advantageous. As another example, while thedescription above focuses on image search, similar techniques could beused to present cross-language search options in response to other typesof queries.

What is claimed is:
 1. A computer-implemented method, comprising:receiving, at a data processing apparatus, a first image search queryand first image search results that are responsive to the first imagesearch query, the first image search query being one or more terms in afirst language; obtaining, by the data processing apparatus,translations of the first image search query, wherein each translationis a translation of the first image search query into a respectivesecond language different from the first language; receiving, at thedata processing apparatus, for each translation of the first imagesearch query, respective image search results that are determined to beresponsive to the translation of the first image search query when thetranslation is used as an image search query; providing firstinstructions to a client device that, when executed by the clientdevice, cause the client device to present a user interface including:one or more of the first image search results responsive to the firstimage search query; and a respective cross-language search option foreach of the translations of the first image search query, the respectivecross-language search option for each translation including thetranslation and a preview of the respective image search resultsresponsive to the translation, wherein each cross-language search resultis selectable in the user interface, and wherein the preview of therespective image search results responsive to the translation is animage that is most frequently selected by users in response tosubmitting the translation as an image search query.
 2. The method ofclaim 1, further comprising, in response to a selection of a firstcross-language search result, providing second instructions to theclient device that, when executed by the client device, cause the clientdevice to present a user interface including a first translationcorresponding to the first cross-language search result and therespective image search results that are responsive to the firsttranslation.
 3. The method of claim 2, wherein: the second instructionsfurther include instructions that, when executed by the client device,cause the client device to present the first image search query; thefirst image search query is selectable in the user interface; and inresponse to a selection of the first image search query, providing thirdinstructions to the client device that, when executed by the clientdevice, cause the client device to present a user interface includingthe first image search results.
 4. The method of claim 1, whereinobtaining one or more selected translations for the first image searchquery comprises: receiving a plurality of candidate translations of thefirst image search query; determining a score for each candidatetranslation; and selecting the translations from the candidatetranslations according to the scores.
 5. The method of claim 4, whereindetermining a score for a candidate translation comprises determiningthe score for the candidate translation from a frequency of submissionmeasurement that measures how often the candidate translation isreceived from users as an image search query.
 6. The method of claim 4,wherein determining a score for a candidate translation comprisesdetermining the score for the candidate translation from a frequency ofrevision measurement that measures how often search queries in the firstlanguage are revised by users to corresponding search queries in therespective second language of the candidate translation.
 7. The methodof claim 4, wherein determining a score for a candidate translationcomprises determining the score for the candidate translation from aclick through rate for the candidate translation when the candidatetranslation is submitted as a search query, wherein the click throughrate measures how often users select search results responsive to thecandidate translation.
 8. The method of claim 4, wherein determining ascore for a candidate translation comprises determining the score forthe candidate translation from a unique users measurement that estimatesa number of unique users that submitted the candidate translation as asearch query.
 9. The method of claim 4, wherein determining a score fora candidate translation comprises determining the score for thecandidate translation from a quantity of results measurement thatmeasures a number of image search results responsive to the candidatetranslation, when the candidate translation is submitted as an imagesearch query.
 10. A system, comprising: a processor; and a computerstorage medium coupled to the processor and including instructions,which, when executed by the processor, causes the processor to performoperations comprising: receiving a first image search query and firstimage search results that are responsive to the first image searchquery, the first image search query being one or more terms in a firstlanguage; obtaining translations of the first image search query,wherein each translation is a translation of the first image searchquery into a respective second language different from the firstlanguage; receiving for each translation of the first image searchquery, respective image search results that are determined to beresponsive to the translation of the first image search query when thetranslation is used as an image search query; providing firstinstructions to a client device that, when executed by the clientdevice, cause the client device to present a user interface including:one or more of the first image search results responsive to the firstimage search query; and a respective cross-language search option foreach of the translations of the first image search query, the respectivecross-language search option for each translation including thetranslation and a preview of the respective image search resultsresponsive to the translation, wherein each cross-language search resultis selectable in the user interface, and wherein the preview of therespective image search results responsive to the translation is animage that is most frequently selected by users in response tosubmitting the translation as an image search query.
 11. The system ofclaim 10, further operable to perform operations comprising, in responseto a selection of a first cross-language search result, providing secondinstructions to the client device that, when executed by the clientdevice, cause the client device to present a user interface including afirst translation corresponding to the first cross-language searchresult and the respective image search results that are responsive tothe first translation.
 12. The system of claim 11, wherein: the secondinstructions further include instructions that, when executed by theclient device, cause the client device to present the first image searchquery; the first image search query is selectable in the user interface;and in response to a selection of the first image search query,providing third instructions to the client device that, when executed bythe client device, cause the client device to present a user interfaceincluding the first image search results.
 13. The system of claim 10,wherein obtaining one or more selected translations for the first imagesearch query comprises: receiving a plurality of candidate translationsof the first image search query; determining a score for each candidatetranslation; and selecting the translations from the candidatetranslations according to the scores.
 14. The system of claim 13,wherein determining a score for a candidate translation comprisesdetermining the score for the candidate translation from a frequency ofsubmission measurement that measures how often the candidate translationis received from users as an image search query.
 15. The system of claim13, wherein determining a score for a candidate translation comprisesdetermining the score for the candidate translation from a frequency ofrevision measurement that measures how often search queries in the firstlanguage are revised by users to corresponding search queries in therespective second language of the candidate translation.
 16. The systemof claim 13, wherein determining a score for a candidate translationcomprises determining the score for the candidate translation from aclick through rate for the candidate translation when the candidatetranslation is submitted as a search query, wherein the click throughrate measures how often users select search results responsive to thecandidate translation.
 17. The system of claim 13, wherein determining ascore for a candidate translation comprises determining the score forthe candidate translation from a unique users measurement that estimatesa number of unique users that submitted the candidate translation as asearch query.
 18. The system of claim 13, wherein determining a scorefor a candidate translation comprises determining the score for thecandidate translation from a quantity of results measurement thatmeasures a number of image search results responsive to the candidatetranslation, when the candidate translation is submitted as an imagesearch query.
 19. A computer-storage medium encoded with a computerprogram, the computer program comprising instructions operable to causedata processing apparatus to perform operations comprising: receiving afirst image search query and first image search results that areresponsive to the first image search query, the first image search querybeing one or more terms in a first language; obtaining translations ofthe first image search query, wherein each translation is a translationof the first image search query into a respective second languagedifferent from the first language; receiving for each translation of thefirst image search query, respective image search results that aredetermined to be responsive to the translation of the first image searchquery when the translation is used as an image search query; providingfirst instructions to a client device that, when executed by the clientdevice, cause the client device to present a user interface including:one or more of the first image search results responsive to the firstimage search query; and a respective cross-language search option foreach of the translations of the first image search query, the respectivecross-language search option for each translation including thetranslation and a preview of the respective image search resultsresponsive to the translation, wherein each cross-language search resultis selectable in the user interface, and wherein the preview of therespective image search results responsive to the translation is animage that is most frequently selected by users in response tosubmitting the translation as an image search query.